TY  - CONF
AU  - Radović, Nenad
AU  - Koprivica, Ankica
AU  - Glišić, Dragomir
AU  - Fadel, Abdunnaser
AU  - Drobnjak, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1635
AB  - The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
C3  - THERMEC 2009, PTS 1-4
T1  - Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels
SP  - 3459
VL  - 638-642
DO  - 10.4028/www.scientific.net/MSF.638-642.3459
ER  - 

@conference{
author = "Radović, Nenad and Koprivica, Ankica and Glišić, Dragomir and Fadel, Abdunnaser and Drobnjak, Đorđe",
year = "2010",
abstract = "The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "THERMEC 2009, PTS 1-4",
title = "Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels",
pages = "3459",
volume = "638-642",
doi = "10.4028/www.scientific.net/MSF.638-642.3459"
}

Radović, N., Koprivica, A., Glišić, D., Fadel, A.,& Drobnjak, Đ.. (2010). Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in THERMEC 2009, PTS 1-4
Trans Tech Publications Ltd, Durnten-Zurich., 638-642, 3459.
https://doi.org/10.4028/www.scientific.net/MSF.638-642.3459

Radović N, Koprivica A, Glišić D, Fadel A, Drobnjak Đ. Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in THERMEC 2009, PTS 1-4. 2010;638-642:3459.
doi:10.4028/www.scientific.net/MSF.638-642.3459 .

Radović, Nenad, Koprivica, Ankica, Glišić, Dragomir, Fadel, Abdunnaser, Drobnjak, Đorđe, "Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels" in THERMEC 2009, PTS 1-4, 638-642 (2010):3459,
https://doi.org/10.4028/www.scientific.net/MSF.638-642.3459 . .

TY  - JOUR
AU  - Radović, Nenad
AU  - Koprivica, Ankica
AU  - Glišić, Dragomir
AU  - Abdunnaser, Fadel
AU  - Drobnjak, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1603
AB  - The influence of Cr, Mo and Mn on microstructure and mechanical properties of V-microalloyed medium-carbon steels has been studied by means of metallography and mechanical testing. Cr, Mn and Mo addition promotes the formation of bainitic sheaves suppressing the formation of ferrite-pearlite and acicular ferrite. The influence of Mn is somewhat masked by a low content of nitrogen. In a low nitrogen steel VN particles are not present and the nucleation of acicular ferrite is suppressed. The yield strength of Cr, Mo and Mn alloyed steels with bainite structures is lower in comparison to the base steel due to less pronounced precipitation strengthening effect. The presence of bainitic sheaves decreases the CVN20 impact energy in comparison to ferrite-pearlite and acicular ferrite microstructures.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels
EP  - 9
IS  - 1
SP  - 1
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1603
ER  - 

@article{
author = "Radović, Nenad and Koprivica, Ankica and Glišić, Dragomir and Abdunnaser, Fadel and Drobnjak, Đorđe",
year = "2010",
abstract = "The influence of Cr, Mo and Mn on microstructure and mechanical properties of V-microalloyed medium-carbon steels has been studied by means of metallography and mechanical testing. Cr, Mn and Mo addition promotes the formation of bainitic sheaves suppressing the formation of ferrite-pearlite and acicular ferrite. The influence of Mn is somewhat masked by a low content of nitrogen. In a low nitrogen steel VN particles are not present and the nucleation of acicular ferrite is suppressed. The yield strength of Cr, Mo and Mn alloyed steels with bainite structures is lower in comparison to the base steel due to less pronounced precipitation strengthening effect. The presence of bainitic sheaves decreases the CVN20 impact energy in comparison to ferrite-pearlite and acicular ferrite microstructures.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels",
pages = "9-1",
number = "1",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1603"
}

Radović, N., Koprivica, A., Glišić, D., Abdunnaser, F.,& Drobnjak, Đ.. (2010). Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 16(1), 1-9.
https://hdl.handle.net/21.15107/rcub_technorep_1603

Radović N, Koprivica A, Glišić D, Abdunnaser F, Drobnjak Đ. Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels. in Metalurgija. 2010;16(1):1-9.
https://hdl.handle.net/21.15107/rcub_technorep_1603 .

Radović, Nenad, Koprivica, Ankica, Glišić, Dragomir, Abdunnaser, Fadel, Drobnjak, Đorđe, "Influence of Cr, Mn and Mo on structure and properties of V microalloyed medium carbon forging steels" in Metalurgija, 16, no. 1 (2010):1-9,
https://hdl.handle.net/21.15107/rcub_technorep_1603 .

TY  - JOUR
AU  - Glišić, Dragomir
AU  - Radović, Nenad
AU  - Koprivica, Ankica
AU  - Fadel, Abdunnaser
AU  - Drobnjak, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1689
AB  - The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite. The effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C, N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN(20) impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.
PB  - Iron Steel Inst Japan Keidanren Kaikan, Tokyo
T2  - ISIJ International
T1  - Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels
EP  - 606
IS  - 4
SP  - 601
VL  - 50
DO  - 10.2355/isijinternational.50.601
ER  - 

@article{
author = "Glišić, Dragomir and Radović, Nenad and Koprivica, Ankica and Fadel, Abdunnaser and Drobnjak, Đorđe",
year = "2010",
abstract = "The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite. The effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C, N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN(20) impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.",
publisher = "Iron Steel Inst Japan Keidanren Kaikan, Tokyo",
journal = "ISIJ International",
title = "Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels",
pages = "606-601",
number = "4",
volume = "50",
doi = "10.2355/isijinternational.50.601"
}

Glišić, D., Radović, N., Koprivica, A., Fadel, A.,& Drobnjak, Đ.. (2010). Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in ISIJ International
Iron Steel Inst Japan Keidanren Kaikan, Tokyo., 50(4), 601-606.
https://doi.org/10.2355/isijinternational.50.601

Glišić D, Radović N, Koprivica A, Fadel A, Drobnjak Đ. Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in ISIJ International. 2010;50(4):601-606.
doi:10.2355/isijinternational.50.601 .

Glišić, Dragomir, Radović, Nenad, Koprivica, Ankica, Fadel, Abdunnaser, Drobnjak, Đorđe, "Influence of Reheating Temperature and Vanadium Content on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels" in ISIJ International, 50, no. 4 (2010):601-606,
https://doi.org/10.2355/isijinternational.50.601 . .

TY  - JOUR
AU  - Drobnjak, Đorđe
AU  - Radović, Nenad
AU  - Andjeli, M
AU  - Koprivica, Ankica
PY  - 1997
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/134
AB  - The effect of test variables on the apparent activation energy for hot working of a medium carbon V-microalloyed steel, Q(HW), and the critical recrystallization temperature, T-nr, have been studied by means of isothermal continuous and anisothermal multipass torsion test. The Q(HW) is found to be temperature dependent. Above the T-nr, the Q(HW)(U) is close to that of austenite self diffusion, Q(SD), irrespective of the type of test or test variables. Below the T-nr, the Q(HW)(L) is not only considerably higher, but that based on multipass flow curve exibits a strong interpass time dependence. With increasing interpass time from 1.8 to 10 s the Q(HW)(L) and the T-nr increase and decrease respectively. The former is assumed to be controlled by solute drag, while the latter both by solute drag and precipitation pinning. Beyond 10 s, the two parameters exhibit the same trend, and the precipitation pinning is assumed to be the only recrystallization inhibiting mechanism.
PB  - Verlag Stahleisen Mbh, Dusseldorf
T2  - Steel Research
T1  - Effect of test variables on apparent activation energy for hot working and critical recrystallization temperatures of V-microalloyed steel
EP  - 312
IS  - 7
SP  - 306
VL  - 68
DO  - 10.1002/srin.199701794
ER  - 

@article{
author = "Drobnjak, Đorđe and Radović, Nenad and Andjeli, M and Koprivica, Ankica",
year = "1997",
abstract = "The effect of test variables on the apparent activation energy for hot working of a medium carbon V-microalloyed steel, Q(HW), and the critical recrystallization temperature, T-nr, have been studied by means of isothermal continuous and anisothermal multipass torsion test. The Q(HW) is found to be temperature dependent. Above the T-nr, the Q(HW)(U) is close to that of austenite self diffusion, Q(SD), irrespective of the type of test or test variables. Below the T-nr, the Q(HW)(L) is not only considerably higher, but that based on multipass flow curve exibits a strong interpass time dependence. With increasing interpass time from 1.8 to 10 s the Q(HW)(L) and the T-nr increase and decrease respectively. The former is assumed to be controlled by solute drag, while the latter both by solute drag and precipitation pinning. Beyond 10 s, the two parameters exhibit the same trend, and the precipitation pinning is assumed to be the only recrystallization inhibiting mechanism.",
publisher = "Verlag Stahleisen Mbh, Dusseldorf",
journal = "Steel Research",
title = "Effect of test variables on apparent activation energy for hot working and critical recrystallization temperatures of V-microalloyed steel",
pages = "312-306",
number = "7",
volume = "68",
doi = "10.1002/srin.199701794"
}

Drobnjak, Đ., Radović, N., Andjeli, M.,& Koprivica, A.. (1997). Effect of test variables on apparent activation energy for hot working and critical recrystallization temperatures of V-microalloyed steel. in Steel Research
Verlag Stahleisen Mbh, Dusseldorf., 68(7), 306-312.
https://doi.org/10.1002/srin.199701794

Drobnjak Đ, Radović N, Andjeli M, Koprivica A. Effect of test variables on apparent activation energy for hot working and critical recrystallization temperatures of V-microalloyed steel. in Steel Research. 1997;68(7):306-312.
doi:10.1002/srin.199701794 .

Drobnjak, Đorđe, Radović, Nenad, Andjeli, M, Koprivica, Ankica, "Effect of test variables on apparent activation energy for hot working and critical recrystallization temperatures of V-microalloyed steel" in Steel Research, 68, no. 7 (1997):306-312,
https://doi.org/10.1002/srin.199701794 . .

TY  - JOUR
AU  - Drobnjak, Đorđe
AU  - Koprivica, Ankica
AU  - Radović, Nenad
AU  - Jelić, M.
PY  - 1996
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/69
AB  - Two-stage linear In [sinh(ασca)] vs.1/T plots, based on isothermal continuous and anisothermal multipass torsion curves, indicate the double Q HW behaviour of a V-steel. Above T nr , Q HW is independent of all variables but strain. Below T nr (which is interpass time dependent), i.e., in a temperature range in which interpass recrystallization is supressed, Q HW is not only increased but that based on multipass curves is also interpass time dependent, and only valid for multipass working operations.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Apparent energy of activation for hot working of vanadium microalloyed steel
EP  - 614
IS  - 7
SP  - 609
VL  - 61
UR  - https://hdl.handle.net/21.15107/rcub_technorep_69
ER  - 

@article{
author = "Drobnjak, Đorđe and Koprivica, Ankica and Radović, Nenad and Jelić, M.",
year = "1996",
abstract = "Two-stage linear In [sinh(ασca)] vs.1/T plots, based on isothermal continuous and anisothermal multipass torsion curves, indicate the double Q HW behaviour of a V-steel. Above T nr , Q HW is independent of all variables but strain. Below T nr (which is interpass time dependent), i.e., in a temperature range in which interpass recrystallization is supressed, Q HW is not only increased but that based on multipass curves is also interpass time dependent, and only valid for multipass working operations.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Apparent energy of activation for hot working of vanadium microalloyed steel",
pages = "614-609",
number = "7",
volume = "61",
url = "https://hdl.handle.net/21.15107/rcub_technorep_69"
}

Drobnjak, Đ., Koprivica, A., Radović, N.,& Jelić, M.. (1996). Apparent energy of activation for hot working of vanadium microalloyed steel. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 61(7), 609-614.
https://hdl.handle.net/21.15107/rcub_technorep_69

Drobnjak Đ, Koprivica A, Radović N, Jelić M. Apparent energy of activation for hot working of vanadium microalloyed steel. in Journal of the Serbian Chemical Society. 1996;61(7):609-614.
https://hdl.handle.net/21.15107/rcub_technorep_69 .

Drobnjak, Đorđe, Koprivica, Ankica, Radović, Nenad, Jelić, M., "Apparent energy of activation for hot working of vanadium microalloyed steel" in Journal of the Serbian Chemical Society, 61, no. 7 (1996):609-614,
https://hdl.handle.net/21.15107/rcub_technorep_69 .